fix coverage colors under Darcula
proper logging
Common updateContent method for Merge and UpdateTo dialog moved to HgUiUtil

*annotations added
*appropriate argument list changed, method became static
*tags/branches maps in HgBranchesAndTags simplify using container util maps
NPE
less logging / better comment
definitions search: allow to provide additional information through search parameters: speed up Ctrl-Shift-I by reduction by type hierarchy (IDEA-109493)
build graph: cleanup done amount if exception is thrown and logged (IDEA-112290)
NPE